The Peripheral Pick-up Tool (PL) has been used since decades where high pick-up accuracy and placement is necessary. The large majority of manufactured PL are made in tungsten carbide (WC) which allows very thin walls to be shaped. The face perpendicularity and flatness are excellent making the PL a highly appreciated tool for applications requiring tight tolerances and very precise parallelism beween die and substrate. The WC material hardness is a guarantee for stable and long life span.
Single piece plastic PL have been recently proposed, their properties are quite different than the traditional WC materiel but many applications can make use of them. The weight, especially for big sizes, and softer contact touch with the die surface are a few of the advantages of plastic.
The shape of the PL tool is sometimes adapted to other requirements as those standard. We see here below a few examples showing notched wall profile to avoid to contact sensitive die surface as well as multi-cavity layout and peripheral vacuum suction cavity.
When and Why to use PL: